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[期刊论文]

Determination of the hydrolysis rate constants and activation energy of aesculin with capillary electrophoresis end-column amperometric detection

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author:

Zhang, Lan (Zhang, Lan.) [1] | Tong, Ping (Tong, Ping.) [2] | Chen, Guonan (Chen, Guonan.) [3]

Indexed by:

EI

Abstract:

Aesculetin is the product of the hydrolysis reaction of aesculin. A high sensitivity and good repeatability method based on capillary electrophoresis with amperometric detection (CE-AD) was developed for simultaneous determination of aesculin and aesculetin in the hydrolysate of aesculin. Under the optimum condition: 10 mmol/L KH2PO4-5 mmol/L Na2B 4O7 (pH 6.0) buffer, separation at 18 kV and +900 mV (versus Ag/AgCl) as the detection potential, the hydrolysis rate constants of aesculin hydrolysis at 25, 30, 35, 40 and 45°C in 0.1 mol/L KOH were obtained as 1.45 × 10-2 min-1, 2.01 × 10 -2 min-1, 2.93 × 10-2 min-1, 3.76 × 10-2 min-1 and 5.05 × 10-2 min-1, respectively. It was calculated that the activation energy for aesculin hydrolysis was 49.4 kJ/mol. © 2005 Elsevier B.V. All rights reserved.

Keyword:

Activation energy Capillarity Drug products Electrophoresis Hydrolysis pH effects Rate constants

Community:

  • [ 1 ] [Zhang, Lan]Sport Science Research Center, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 2 ] [Zhang, Lan]Key Laboratory of Analysis and Detection Technology for Food Safety, MOE and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 3 ] [Tong, Ping]Sport Science Research Center, Fuzhou University, Fuzhou, Fujian 350002, China
  • [ 4 ] [Chen, Guonan]Key Laboratory of Analysis and Detection Technology for Food Safety, MOE and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China

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Source :

Journal of Chromatography A

ISSN: 0021-9673

Year: 2005

Issue: 1-2

Volume: 1098

Page: 194-198

3 . 0 9 6

JCR@2005

3 . 8 0 0

JCR@2023

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 17

30 Days PV: 1

Affiliated Colleges:

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